Optical Properties of Nanographite Ribbons

A first-principles study on the electromechanical effect of graphene nanoribbon

“…The study of GNR is motivated by the fundamental physics interests for the low-dimensional materials and the potentials of versatile applications of the novel structures [1][2][3]. Owing to the structure being similar to carbon nanotubes (CNTs), GNRs are expected to have various unique properties and capabilities for the next generation devices [3][4][5][6][7][8][9][10][11][12][13][14]. As CNTs are predicted to have high stiffness and axial strength, the mechanical properties of CNTs have been a focus of extensive studies.…”

Anisotropy of the Raman Spectra of Nanographite Ribbons

“…The optical absorption process in nanographite ribbons is associated with electronic transitions between the valence () and conduction ( ) 1D subbands [17,18]. The quantum confinement of the electrons in a 1D structure restricts the wave vectors (k) of the electrons involved in the absorption process that are associated with transitions between van Hove singularities in the valence and conduction bands.…”

Terahertz transitions in carbon nanotubes and graphene nanoribbons

“…Upon increasing the excitation energy, the absolute value of the transition matrix element first rapidly decreases, and thereafter it starts to increase proportionally to the photon frequency. Notably, the sharp transition peak near the band edge of quasi-metallic CNTs has been overlooked in the extensive literature on optical transitions in single-walled CNTs [20] and graphene nanoribbons [21,22,23,24].…”